This is Casio's first resin case model. It's also the watch famously known as the Alien. Also, unusually for this era, it has a 1/100th second stopwatch. It's a very old model, but I don't think there's any major damage. As you can see from the images, all functions are working. (The bottom left button is just a little stiff.) When adjusting the time, please press the adjustment switch a little firmly. When adjusting, the hours and minutes will advance automatically. This is how this watch is designed. The battery was replaced on 3/8. This is a listing for the main unit only. Please note that the band is not original. This is a used item, so please understand before purchasing. No claims, no returns, no cancellations, please. Thank you.